-Strong knowledge of Android SDK, different versions of Android, and how to deal with different screen sizes.

-Familiarity with RESTful APIs to connect Android applications to back-end services.
-Strong knowledge of Android UI design principles, patterns, and best practices.
-Experience with offline storage, threading, and performance tuning.
-Ability to design applications around natural user interfaces, such as touch.
-Familiarity with the use of additional sensors, such as gyroscopes and accelerometers.
-Knowledge of the open-source Android ecosystem and the libraries available for common tasks.
-Ability to understand business requirements and translate them into technical requirements.
-Familiarity with cloud message APIs and push notifications.
-A knack for benchmarking and optimization.
-Understanding of Googles Android design principles and interface guidelines.
-Proficient understanding of code versioning tools, such as Git or SVN.
-Familiarity with continuous integration.